In Firefox my new store looks exactly as I want it to.

In IE, that isn't the case.

http://tigercentral.boosternation.com

At the top search bar should be directly above the header image. In Firefox it is; in IE there seems to be some padding/spacing.

Also, the left sideboxes should have a complete border around them. They do in Firefox, but not IE.

Any suggestions?

Thanks in advance.